/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.integration;

import org.apache.iotdb.integration.env.ConfigFactory;
import org.apache.iotdb.integration.env.EnvFactory;
import org.apache.iotdb.itbase.category.ClusterTest;
import org.apache.iotdb.itbase.category.LocalStandaloneTest;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import java.sql.Connection;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;

import static org.junit.Assert.*;

@Category({LocalStandaloneTest.class, ClusterTest.class})
public class IoTDBQueryMemoryControlIT {

    private static final String[] sqls =
            new String[]{
                    "CREATE DATABASE root.ln",
                    "create timeseries root.ln.wf01.wt01 with datatype=INT32,encoding=PLAIN",
                    "create timeseries root.ln.wf01.wt02 with datatype=INT32,encoding=PLAIN",
                    "create timeseries root.ln.wf01.wt03 with datatype=INT32,encoding=PLAIN",
                    "create timeseries root.ln.wf01.wt04 with datatype=INT32,encoding=PLAIN",
                    "create timeseries root.ln.wf01.wt05 with datatype=INT32,encoding=PLAIN",
                    "create timeseries root.ln.wf02.wt01 with datatype=FLOAT,encoding=RLE",
                    "create timeseries root.ln.wf02.wt02 with datatype=FLOAT,encoding=RLE",
                    "create timeseries root.ln.wf02.wt03 with datatype=FLOAT,encoding=RLE",
                    "create timeseries root.ln.wf02.wt04 with datatype=FLOAT,encoding=RLE",
                    "create timeseries root.ln.wf02.wt05 with datatype=FLOAT,encoding=RLE",
                    "create timeseries root.ln.wf03.wt01 with datatype=DOUBLE,encoding=PLAIN",
                    "create timeseries root.ln.wf03.wt02 with datatype=DOUBLE,encoding=PLAIN",
                    "create timeseries root.ln.wf03.wt03 with datatype=DOUBLE,encoding=PLAIN",
                    "create timeseries root.ln.wf03.wt04 with datatype=DOUBLE,encoding=PLAIN",
                    "create timeseries root.ln.wf03.wt05 with datatype=DOUBLE,encoding=PLAIN",
            };

    @BeforeClass
    public static void setUp() throws Exception {
        ConfigFactory.getConfig().setMaxQueryDeduplicatedPathNum(10);
        EnvFactory.getEnv().initBeforeClass();
        createTimeSeries();
    }

    private static void createTimeSeries() {
        try (Connection conn = EnvFactory.getEnv().getConnection();
             Statement statement = conn.createStatement()) {
            for (String sql : sqls) {
                statement.execute(sql);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @AfterClass
    public static void tearDown() throws Exception {
        EnvFactory.getEnv().cleanAfterClass();
        ConfigFactory.getConfig().setMaxQueryDeduplicatedPathNum(1000);
    }

    @Test
    public void selectWildcard() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            try {
                statement.execute("select * from root.**");
            } catch (SQLException e) {
                assertTrue(e.getMessage().contains("Too many paths in one query!"));
            }

            try {
                statement.execute("select count(*) from root");
            } catch (SQLException e) {
                assertTrue(e.getMessage().contains("Too many paths in one query!"));
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectWildcardSlimit10() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("select * from root.** slimit 10");
            statement.execute("select count(*) from root slimit 10");
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectWildcardSlimit11() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            try {
                statement.execute("select * from root.** slimit 11");
            } catch (SQLException e) {
                assertTrue(e.getMessage().contains("Too many paths in one query!"));
            }

            try {
                statement.execute("select count(*) from root slimit 11");
            } catch (SQLException e) {
                assertTrue(e.getMessage().contains("Too many paths in one query!"));
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectWildcardWildcardWildcardSlimit5Soffset7() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("select wf01.*, wf02.*, wf03.* from root.ln slimit 5 soffset 7");
            ResultSetMetaData resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(1 + 5, resultSetMetaData.getColumnCount());
            for (int i = 2; i < 3 + 2; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }
            for (int i = 3 + 2; i < 5 + 2; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf03.wt0"));
            }

            statement.execute(
                    "select count(wf01.*), avg(wf02.*), sum(wf03.*) from root.ln slimit 5 soffset 7");
            resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(5, resultSetMetaData.getColumnCount());
            for (int i = 1; i < 3 + 1; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }
            for (int i = 3 + 1; i < 5 + 1; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf03.wt0"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectWildcardWildcardWildcardSlimit5Soffset5() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("select wf01.*, wf02.*, wf03.* from root.ln slimit 5 soffset 5");
            ResultSetMetaData resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(1 + 5, resultSetMetaData.getColumnCount());
            for (int i = 2; i < 5 + 2; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }

            statement.execute(
                    "select count(wf01.*), sum(wf02.*), avg(wf03.*) from root.ln slimit 5 soffset 5");
            resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(5, resultSetMetaData.getColumnCount());
            for (int i = 1; i < 5 + 1; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectWildcardWildcardWildcardSlimit15Soffset5() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("select wf01.*, wf03.*, wf02.* from root.ln slimit 15 soffset 5");
            ResultSetMetaData resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(1 + 10, resultSetMetaData.getColumnCount());
            for (int i = 2; i < 5 + 2; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf03.wt0"));
            }
            for (int i = 5 + 2; i < 10 + 2; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }

            statement.execute(
                    "select sum(wf01.*), avg(wf03.*), count(wf02.*) from root.ln slimit 15 soffset 5");
            resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(10, resultSetMetaData.getColumnCount());
            for (int i = 1; i < 5 + 1; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf03.wt0"));
            }
            for (int i = 5 + 1; i < 10 + 1; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectWildcardWildcardWildcardSlimit15Soffset4() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            try {
                statement.execute("select wf01.*, wf02.*, wf03.* from root.ln slimit 15 soffset 4");
            } catch (SQLException e) {
                assertTrue(e.getMessage().contains("Too many paths in one query!"));
            }
            try {
                statement.execute(
                        "select count(wf01.*), avg(wf02.*), sum(wf03.*) from root.ln slimit 15 soffset 4");
            } catch (SQLException e) {
                assertTrue(e.getMessage().contains("Too many paths in one query!"));
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectWildcardWildcardWildcardSlimit3Soffset4() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("select wf01.*, wf02.*, wf03.* from root.ln slimit 3 soffset 4");
            ResultSetMetaData resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(1 + 3, resultSetMetaData.getColumnCount());
            for (int i = 2; i < 1 + 2; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf01.wt0"));
            }
            for (int i = 1 + 2; i < 3 + 2; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }

            statement.execute(
                    "select sum(wf01.*), count(wf02.*), avg(wf03.*) from root.ln slimit 3 soffset 4");
            resultSetMetaData = statement.getResultSet().getMetaData();
            assertEquals(3, resultSetMetaData.getColumnCount());
            for (int i = 1; i < 1 + 1; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf01.wt0"));
            }
            for (int i = 1 + 1; i < 3 + 1; ++i) {
                assertTrue(resultSetMetaData.getColumnName(i).contains("root.ln.wf02.wt0"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }
}
